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Absolute Black > Mountain chainrings > Oval narrow-wide > Absolute Black OVAL Cannondale Hollowgram direct mount chainring N/W

Absolute Black OVAL Cannondale Hollowgram direct mount chainring N/W

$109.99 CAD
Absolute Black
 

Absolute Black OVAL Cannondale Hollowgram direct mount chainring N/W

Item#PriceStock
30T black
#: CNOV30BK
Price: $109.99
Stock: Out of stock
CNOV30BK$109.99Out of stock
32T black
#: CNOV32BK
Price: $109.99
Stock: In stock
CNOV32BK$109.99In stock
34T black
#: CNOV34BK
Price: $109.99
Stock: In stock
CNOV34BK$109.99In stock
30T green
#: CNOV30GN
Price: $109.99
Stock: In stock
CNOV30GN$109.99In stock
32T green
#: CNOV32GN
Price: $109.99
Stock: Out of stock
CNOV32GN$109.99Out of stock
34T green
#: CNOV34GN
Price: $109.99
Stock: Out of stock
CNOV34GN$109.99Out of stock


Overview

Our premium 1X Cannondale Hollowgram direct mount Oval chainrings are designed for Hollowgram crank family. Compatible with old and newest models.tim

Advantages of our special Direct mount chainrings:

  • Finest design to provide excellent weight to strength ratio
  • One of a kind special oval shape (Patent Pending)
  • Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!
  • They save weight because they don't need the spider and chainring bolts.
  • The ability of installation of a smaller ring sizes that can't be mounted on regular spider.
  • Superb quality and great look.
  • You will ride faster using ovals. If you keep using round ring then others will get quicker.
  • You will not "feel" the oval shape at all
  • Reduces stress on knees

Hollowgram Oval chainrings allow for flawless 1x10/11 drivetrain setup. Reliable, extremely light, stiff and clean looking

Specs

Size (Mass +/-1g): 30T(61g), 32T(66g), 34T(72g)
Color: Black,  Green
Compatibility: Cannondale Hollowgram Si, SiSL, SiSL2 and newest F-Si
Material: cnc machined 7075 Txxx Aluminum. Long-lasting construction
Finish: anodized
Chainline: 47-50mm (5.7mm offset). Chainline depends on the length of the axle you use and spacers configuration.
Ovality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3 after TDC (top dead center) Patent Pendingy

Designed in UK. Manufactured in Poland (EU).  The lightest solution on the bicycle market period.imized to each size separately. Range: 10fffand fTiming of 110.5-116.3 after TDC (top dead center) Patent

 
Why Oval

Why our oval chainrings work
Our traction Oval chainrings work because a rider does not produce power evenly through a pedal stroke; they maximize the part of the stroke where power is produced and minimize resistance where it isn't. Oval rings make the spin cycle a lot smoother and are easier on legs while climbing. Believe it (or not), but a round chainring doesn't transfer torque to your rear wheel as smoothly as an Oval one. You will actually feel your stroke to be more "round" with an Oval shape than with a round chainring.

Why it matters
Traction, Traction and Traction. With oval rings rear tire traction improves greatly on loose and slippery terrain. Smoother power delivery to your rear wheel means that you will be able to maintain better, constant cadence; get less stress on the joints (knees) and therefore be able to keep certain level of effort for longer. This results in higher average speed. Moreover, 11 studies made by various Universities in the World show that using oval chainrings human legs utilize more muscle groups (compared to round one), but each of them to lesser degree. Load from pedaling an oval chainring is spread over greater muscle mass which in effect gives you the feeling of fresher and more relaxed legs. It is world's finest oval chainring backed by tens of thousands of customers.

The importance of timing and shape with oval chainrings
The oval chainring movement across all cycling disciplines is growing rapidly, led by absoluteBLACK, the world leaders in this important product category.

However, not all oval chainrings share the same performance characteristics as absoluteBLACK. The 'clocking' (timing) and shape of the oval are the most crucial parts of any oval chainring design, absoluteBLACK spent three years in design development and have perfected both timing and shape design elements - ensuring the ride quality of absoluteBLACK oval ring will be different and superior to ovals from other brands (as many abosluteBLACK customers already realised).

Where most other brands retain the same timing (position of the crank arm relative to the oval) and shape of the oval across all their sizes - because it's cheaper and less time consuming. absoluteBLACK believe that each different size ring requires a bespoke, optimised, perfect pedalling solution. So that is what we do - for every chainring absoluteBLACK make. For example, the smaller the chainring size, the bigger the ovality has to be to help climb steeper hills more effectively. We keep our exact Patent Pending data a secret, to ensure we get the best possible absoluteBLACK advantage over other brands, and you get the best possible ride experience.
 
Technology

Word on BIOPACE
Please understand that this is not Biopace technology. Shimano created Biopace with the completely wrong orientation of the biggest radius of the oval. Instead of positioning it in power zone which is slightly below the level of the crank, they clocked it to the dead zone where human generates least power. The result was that in power zone pedaling was too easy and in dead zone very difficult. Exactly opposite to how it should be.

Round rings do not optimize the way humans produce power

Other elliptical chainrings
Clocking (timing) and shape of the oval are the most crucial parts of the design. Ride quality of Absoluteblack Oval ring will be different to ovals from brand X or Y. 2 years of development of our ovals resulted in commercially most successful product of its kind. AbsoluteBlack is the First company who managed to successfully popularize ovals in mountainbike sport. Please note: Other manufacturers offer one timing and ovality setting for all chainring sizes, but pedaling behavior changes with each size considerably. To optimize for this, every chainring size needs to be a bit different. For example the smaller the chainring size the bigger the ovality has to be to help climb steeper hills more effectively. This is where we specialize in and optimize every size to particular pedaling style. This is also why we do not provide information about timing and exact ovality of the chainring as each one is different.

 
Installation

Mounting instruction:

  • Generously grease the waved shape of the crank arm, then put the chainring so that fits completely(convex side to the crank arm). Put small amount of medium strength Loctite on the lockring threads and tighten it with torque of about 47-54 Nm. 
  • You will need "Cannondale Hollowgram Spider Removal Tool KT012" or similar to open and close the lockring. 
  • The most advanced, Patent Pending tooth profile on the Market guarantee minimum 12 months of excellent chain retention capabilities! We mean it. You can finally take your chainkeeper off of the bike. Tested by XC Silver World Champion Marek Konwa.

Comparison chart:
XX1 spider + XX1 ring: 28T(69g), 30T(81g), 32T(84g), 34T(91g) 

AbsoluteBLACK chainring: 28T(55g), 30T(56g), 32T(57g), 34T(70g) 
 
FAQ
 
What size should I choose?
  • 30T Oval chainring has the ovality of 28/32T and is best for someone who uses currently 28 or 30T round ring.
  • 32T oval ring will suit best someone who uses 31 or 32T chainring currently. While pedaling, you will feel quite similar effort to the one riding round 31T ring (as the smallest diameter of the oval is 30T), but you will gain the speed similar to riding 33/34T chainring.
  • 34T Oval chainring has an ovality of 32/36T and is best for someone who uses currently 33 or 34T round ring.

 

 
 
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